-2-1.PreventiveMaintenanceChecksandServicesforSartoriusAnalyticBalance( ModelA200S).Routine maintenance ensures troublefree operation. Checks and services listed below should be conducted dailyand prior to each use.Check/ServiceNoteCheck that glass plates are notRemove glass to clean.cracked, chipped, or dirty.Check that interior of weighingRemove weighing pan and wipe interior clean using acompartment is clean.lintfree, dry cloth. Remove dust particles with camelshair brush. Clean and replace weighing pan.2.Troubleshooting.Troubleshooting this equipment consists of observing results of normal operations andresults of running both the external and internal calibration checks. It also includes a thorough visual inspection ofthe measuring cell and all electrical connections.a.If you detect the following problems:- poor reproducibility display hysteresis nonreproducible corner load permanent L in the display skipping displayyou are very likely dealing with a mechanical fault.b.If you find: error message in the display display dark or display segments missingyou are very likely dealing with an electronic error.3.MaintenanceRemove/ReplaceProcedures.3.1 Remove/Replace the Display Panel.a.b.Remove weighing pan, ring, shield plate, and base plate from the balance. Unscrew three screws (1) fromthe hood and carefully lift hood to the right and place next to balance.NOTEThe display panel includes the tare pcb, when the balance has basic equipment.Remove the keyboard overlay (2) in the display panel (3). Remove screw (4) in the display panel.